diff --git a/scripts/open-mr.sh b/scripts/open-mr.sh
index e79dcd82..4af2c712 100755
--- a/scripts/open-mr.sh
+++ b/scripts/open-mr.sh
@@ -1,4 +1,4 @@
-#!/bin/sh -ve
+#!/bin/bash -ve
 
 # source: https://about.gitlab.com/blog/2017/09/05/how-to-automatically-create-a-new-mr-on-gitlab-with-gitlab-ci/